adams



My 21,1946. n. A. ADAMS 2,400,676

PUMP f l Filed Nov. 29, 1.943

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Patented May 21, 1946 UNITED" s'm'rsv PATENT OFFICE 2,400,676 PUMrHarold A. Adams, Bakersfield, Calif.

Application November 29, 1943, Serial No. 512,236

3 Claims.

My invention relates to the coolant pump driving mechanism and has forits main object the effective rotation ef the pump through a mechanicaldrive system, which is adjustable for various conditions of wear,mounting facilities, and volume of coolant output. The coolant medium,either used for the purpose of evaporating or as a liquid refrigerant ina compressor system, frequently is circulated by means of an auxiliaryelectric motor driven pump.

The electric motor and current conducting wires are particularlysusceptible to failure under the conditions of excessive water vapor andWater. My invention provides a pump drive which is mechanically operatedby frictional drive and which, furthermore, is easily and quicklyadaptable to varying requirements of output and motive power.

As the present war conditions make it impos sible or extremely difficultand disadvantageous to use or secure metals and certain other materials,either for repair or construction of new products, my invention isdesigned to use the minimum quantities of scarce, war-importantmaterials by substituting to the greatest possible extent therefornon-critical construction items such as wood, formed plastics, fibre andother available products.

Additional objects and advantages of my invention will be apparent fromthe following description considered in conjunction with theaccompanying sheet of drawings or from both as supplements of eachother, wherein are set forth certain novel features of construction,combination and arrangement of parts.

In the accompanying sheet of drawings forming a part of thesespecifications, and in which like numerals are employed to designatelike parts:

Figure l is a side elevation, partly sectional, of a pump-drivingmechanism constructed in accordance with my invention and illustratingmainly the frictional drive members, the horizontal and verticaladjusting means and the tension device.

Figure 2 is a sectional View of the friction drive and positioningmeans, together with the pivoting and bearing mechanisms.

Figure 3 is a fragmentary front elevation illustrating mainly thevertical adjusting means.

Figure 4 is a bottom plan view of a pump impeller.

Referring now in detail to the Figures 1, 2, 3, and 4, wherein forpurposes of illustration are shown preferred embodiments of myinvention, the numeral 5 designates the housing of a conventionalVentilating fan, from which extends the fan drive shaft B, to which issecured the pulley 'I, driven by belt 8 connected to a source of power.A side surface 9 of the pulley l, if suitable, is machined to afiattened area of appreciable extent, or a circular plate of washer-likeform may be attached to the side of pulley 'I. This pulley side surface9 acts as the driving element of a friction drive and extends from theperimeter of the pulley I such a distance toward the shaft 6 as topermit the point of contact of the driving and driven friction membersto be varied in position on pump shaft I0 towards or from the pulleyshaft for the purposes of decreasing or increasing the revolutions ofthe driven friction disc I2. By this provision for adjusting the speedof the driven disc I2 and the resultant change in speed of the pumpshaft I0 and pump impeller 44 attached thereto, an accurate andpredetermined liquid output of the pump may be obtained.

Bearing againstl the pulley surface 9 under pressure resulting fromtension spring 26 is the driven friction disc I2 constructed of fibre,leather, rubber or VYother suitable material. The friction disc I2 issecurely clamped on sleeve I3 between washers I8 and I9 by nut II, whichwhen sufliciently tightened is locked in position by set screw I5.

Sleeve I3 is adjustably secured at the desiredV kposition on pump driveshaft I0 by set screw I6.

To pump shaft I0 is secured collar I4, locked by set vscrew I'I at suchposition on shaft I0 as to correspond with the vertical mountingposition on supporting frame 2S and allow the pump assem- `bly to besubmerged in the 1iquid at the proper depth by its action as a thrustcollar resting on bearing 32 and supporting the weight of the shaft Ill,the pump impeller M and other parts secured to shaft I0.

Upper bearing 32 and lower bearing 33 are secured in spaced relation inbody block 2d with the intervening space 34 forming a grease charnberaround shaft l. A grease cup 35 is attached to body block 24 and extendstherethrough to grease chamber 34. Releasably secured in body block 24are supporting pivots 22 extending through sound absorbing resilientgrommets 31 which are inserted in the appropriate mounting .holes 23v ofbrackets 20 and secured therein in spaced relation,

In mounting brackets 2U are located a plurality of mounting holes 23, ofwhich, on installation of the pump, the appropriate one may be selectedfor insertion of the supporting pivots 22, so that the complete assemblyof pump, supporting frame and driven friction disc may be adjusted inspaced horizontal relationship to secure the best operating position ofVthe pump in respect to the driving pulley frictional surface 9, the airconditioner Ventil-ating fan housing 5, and the liquid reservoir 46.

Brackets 20 are releasably secured to housing by bolts 2| or otherconventional means. A catch hook 2 is provided for securing one end ofvtension spring 26, the other end of which is secured to pin 25,fastened to body block 24.V The function of spring 26 is to exert acontinuous pull Von Vbody block 24 due tothe. free swinging action ofpivots 22, thus forcing the driven disc l2 against the driving surface 9and providing compensation forV Wear of driver 9 and driven disc l2.While I have y'attained continuous contact of the frictional discsurfaces by means of a tension spring, it is recognized `that the same.Y

effect may be secured by an appropriately positioned Weight, compressionspring or other con- Yventional means.

Body block 24 is secured at an appropriateloca- Vtionto supporting frame28 by bolt 29 and also at an appropriate location the pump housing 39 issecured to supporting frame by screws 45. Supporting frame 28 isprovided with a plurality of mounting holes V3i] of which, oninstallation of the pump, the appropriate hole may be selectedV throughwhich bolt 29 secures supporting frame 28 to the body block so that thecomplete assembly of pump-supporting frame and the driven friction discmay be adjusted in spaced vertical relationship in coordination with theadjustment of the Ypump impeller to secure the best operating positionof the pump in respect to the driving pulley frictional surface 9, theair conditionerV Ventilating fan housing 5 and the liquid reservoir 46.

Wire latch 3| is inserted through holes in bolts 22 and 29 to preventloosening, Y

To shaft i0' isgsecurely fastened pump impeller d4 by screwdjjurrounding a portion of shaft l0 and inflpellerjlld Ya bearingsection 33 andpump housing 39 and closing'plate 4d are secured `inspaced relationship tosupportingV frame 28 by screws 45. Closingvplateviis provided with an inlet il and housing 38 is provided With anoutlet 42. Y Y

`In adapting my invention to existing Vor reused pumps impellers ofcurved or other conventional shapes may be used, though impeller vanes44 of a parallel radial type are preferred, as liquid flow will thenresult from either clockwise or counter-clockwise revolution ofthe'impeller. A Y Y The paramount advantage of a frictional drivingdevice for circulating liquid pumps of an air conditioner, which affordsinbuilt simple means of vertical and horizontal positioning and Which isoperable in either rotational direction, Vshould Y be beneficial anduseful, not only for the purpose of simplifying new installations, butparticularly for reconditioning and replacing inservice at Vminimumexpense and lossV of installation time many of the air conditioningdevices now rendered inoperative through inability to obtain, be

cause of War conditions, the proper materials andY parts for repairingthe defective items.y

It will be understood that-while the form of my frictional drive for airconditionerA liquid circulating pumps herein illustrated and describedis to be considered as a preferred embodiment of my invention, I donotlimit myself to the precise constructions as disclosed, but reservethe right to resort to and substitute various modifica- 'tions andchanges in shape, size and arrangement of parts Withoutdeparting fromthe spiritV of my invention or the scope of my claims asY described andindicated above and in the drawing and the followingclaims. Y

Having thus described ,my invention I claim:

'Y l. Ina pump consisting of a driving surface, an adjustable drivendisc, a shaft operated by said driven disc, a liquid pump, a pumpimpeller operated by s aidgshaft, a body block supporting said shaft,mounting brackets, pivots inserted in said body block and mountingbrackets, sound.

absorbing grommets supporting said pivots; a

perforated frame supporting said liquid pump in Van adjustable parallelrelationship with said driving surface and a spring securing said liquidpump in a continuously tensed angular operative relationship With saiddriving surface.v ,Y

2. In a pump consisting of a friction drive mechanism comprising incombination, a driving surface, a driven disc adjustable as to speed and3. In a pump'consisting of a direction of rotation, a shaft operatedbyrsaid v driven disc, a pump impellerattached to said shaft, a pumphousing surrounding said pump impeller; provided with plural bearings; abodyv block secured Within said pluralbearings in an Y adjustibleparallel relationship with said driving surface; a frame provided withplural positioning holes securing said body block in an adjustablespaced liner relationship with saiddriving surface and a spring attachedto one of said mounting brackets and said body block, so Athat saidtension spring continuously exerts force tomantain frictionalcontactbetween said driving surface andrsaid driven disc.

' driving surface, a shaft, a friction disc mounted on the shaft, a pumpimpeller secured to said shaft and a pump ,housing surrounding saidimpeller; means `for adjustably securing Ythe friction disc to theYshaftV Yin such spaced relationship that the speed of said 'frictiondisc may be predetermined as selected; a body block; a collar adjustablysecuring theshaft in the body block in a parallel spacedrelationshipvvith the'driving surface; mounting brackets provided withaV plurality of holes adjustably sei ,Y

curing said body block in a spaced'relationship parallel with thedriving surface; a tension spring holding said 'disc'under stress inspaced angular relationship with the driving surface;V a liquid mediumreservoirya supporting frame'provided withY a plurality of Ymountingholes securing said pump and pump'housing in anY adjustable parallel andlinear spaced relationship .with the driving mechanism andthe liquidmediumrese'rvoirgallV i ,coacting and cooperatinglto'maintain the fric-Y tion` discVpump impeller and pump housing in suchparallel, angular andlinear spaced relation-Y L ship withV .the Ydriving'surfac'e and theliquid me- Vdium reservoir that voperative, functioning of the drivingsurface-'effects automatic ,movement of I the liquid medium.

HAROLD A'. ADAMS.

